path: root/usr.sbin/efivar/efivar.8
diff options
authorWarner Losh <imp@FreeBSD.org>2018-10-26 22:13:40 +0000
committerWarner Losh <imp@FreeBSD.org>2018-10-26 22:13:40 +0000
commite08bb1091c785305ccf552e612019aa94ab1cc5b (patch)
treebe3eeb664a452ee7c1fe556597be0199dd3db9a4 /usr.sbin/efivar/efivar.8
parent9a815e0a58cc754559cf2f4a9201b118e31e00d8 (diff)
Implenent --fromfile to read variable values when printing variables
So ./efivar --fromfile Boot0001.bin --print --load-option will take the value from Boot0001.bin file and then decode it as if it were a load-option. This is useful for debugging handling of such variables that may be hanging the boot for some people. Sponsored by: Netflix, Inc
Notes: svn path=/head/; revision=339797
Diffstat (limited to 'usr.sbin/efivar/efivar.8')
1 files changed, 11 insertions, 2 deletions
diff --git a/usr.sbin/efivar/efivar.8 b/usr.sbin/efivar/efivar.8
index 07c7366e7dec..7113ba931e46 100644
--- a/usr.sbin/efivar/efivar.8
+++ b/usr.sbin/efivar/efivar.8
@@ -86,8 +86,17 @@ This flag implies
.Fl -write
unless the
.Fl -append
-flag is given.
-This behavior is not well understood and is currently unimplemented.
+.Fl -print
+flags are given.
+This behavior is not well understood and is currently unimplemented
+for writes.
+.Fl -print
+is specified, the contents of the file are used as the value to
+print using any other specified flags.
+This is used primarily for testing purposes for more complicated
+variable decoding.
.It Fl a Fl -append
Append the specified value to the UEFI variable rather than replacing